JB/T 9204-2008 PDF English
US$105.00 · In stock · Download in 9 secondsJB/T 9204-2008: Metallographic examination of induction hardened steel parts Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid JB/T 9204: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| JB/T 9204-2008 | English | 105 |
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Metallographic examination of induction hardened steel parts
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| JB/T 9204-1999 | English | 279 |
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Metallographic examination of induction hardened steel parts
| Obsolete |
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JB/T 9204-2008: Metallographic examination of induction hardened steel parts---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JBT9204-2008
JB
MACHINERY INDUSTRY STANDARD
ICS 25.200
J 36
Record No.. 24503-2008
Replacing JB/T 9204-1999
Metallographic examination of
induction hardened steel parts
Issued on. JUNE 4, 2008
Implemented on. NOVEMBER 1, 2008
Issued by. National Development and Reform Commission, People's
Republic of China
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Technical requirements... 4
4 Sample preparation... 5
5 Inspection methods... 5
Foreword
This Standard replaces JB/T 9204-1999 Metallographic examination of
induction hardened steel parts.
Compared with JB/T 9204-1999, the main changes in this Standard are as
follows.
- specified and labelled various information on the cover;
- adjusted and populated the relevant elements in the Foreword;
- improved the introduction of "Normative references" and gave the
identification of the project;
- the previous edition divided the "microscopic organization classification
map" into 1~10 levels which were represented respectively with 10 figure
numbers from "Figure 1 ~ Figure 10"; this Standard divided the
"microscopic organization classification map" as Figure 1 and the figure
numbers are "a) ~ j)" (see 3.3, Table 1, Figure 1).
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee
on Heat Treatment of Standardization Administration of China (SAC/TC 75).
Main drafting organizations of this Standard. Beijing Mechanical and Electrical
Research Institute, First Automobile Group Corporation.
Main drafters of this Standard. Wu Bingshu, Liu Kejun, Xu Xiangqiu.
Versions of standard substituted by this Standard are.
- ZB J36009-1988;
- JB/T 9204-1999.
Metallographic examination of
induction hardened steel parts
1 Scope
This Standard specifies the technical requirements and corresponding
inspection methods for metallographic examination of induction hardened steel
parts.
This Standard is applicable to the examination of mechanical parts made of
medium carbon structural steel and medium carbon alloy steel with
metallographic structure and effective hardened layer depth after high and
medium induction hardening.
2 Normative references
The following standards contain the provisions which, through reference in this
Standard, constitute the provisions of this Standard. For dated references,
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard. However, the parties who enter into agreement based on this
Standard are encouraged to investigate whether the latest versions of these
documents are applicable. For undated reference documents, the latest
versions apply to this Standard.
GB/T 5617, Determination of effective depth of hardening after induction or
flame hardening of steel (GB/T 5617-2005, ISO 3754.1976, NEQ)
3 Technical requirements
3.1 The surface hardness of the part and the effective hardened layer depth
shall comply with the provisions of the product drawings.
3.2 After the parts are quenched, there shall be no defects such as cracks or
burns on the surface.
3.3 After quenching and low temperature tempering (≤200°C), the
metallographic structure is evaluated according to Figures 1a) ~ j). See Table 1
for rating description.
4 Sample preparation
4.1 Sampling site. intercept in the middle of the induction hardening zone of
the part or intercept according to the technical conditions of the part. There shall
be no tempering when sampling.
5 Inspection methods
5.1 Effective hardened layer depth measurement method. after quenching
and low temperature tempering, the parts are measured on a Vickers hardness
tester with a test force of 9.8N on a specified portion of the cross section
perpendicular to the surface of the part.
JB/T 9204-2008
JB
MACHINERY INDUSTRY STANDARD
ICS 25.200
J 36
Record No.. 24503-2008
Replacing JB/T 9204-1999
Metallographic examination of
induction hardened steel parts
Issued on. JUNE 4, 2008
Implemented on. NOVEMBER 1, 2008
Issued by. National Development and Reform Commission, People's
Republic of China
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Technical requirements... 4
4 Sample preparation... 5
5 Inspection methods... 5
Foreword
This Standard replaces JB/T 9204-1999 Metallographic examination of
induction hardened steel parts.
Compared with JB/T 9204-1999, the main changes in this Standard are as
follows.
- specified and labelled various information on the cover;
- adjusted and populated the relevant elements in the Foreword;
- improved the introduction of "Normative references" and gave the
identification of the project;
- the previous edition divided the "microscopic organization classification
map" into 1~10 levels which were represented respectively with 10 figure
numbers from "Figure 1 ~ Figure 10"; this Standard divided the
"microscopic organization classification map" as Figure 1 and the figure
numbers are "a) ~ j)" (see 3.3, Table 1, Figure 1).
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee
on Heat Treatment of Standardization Administration of China (SAC/TC 75).
Main drafting organizations of this Standard. Beijing Mechanical and Electrical
Research Institute, First Automobile Group Corporation.
Main drafters of this Standard. Wu Bingshu, Liu Kejun, Xu Xiangqiu.
Versions of standard substituted by this Standard are.
- ZB J36009-1988;
- JB/T 9204-1999.
Metallographic examination of
induction hardened steel parts
1 Scope
This Standard specifies the technical requirements and corresponding
inspection methods for metallographic examination of induction hardened steel
parts.
This Standard is applicable to the examination of mechanical parts made of
medium carbon structural steel and medium carbon alloy steel with
metallographic structure and effective hardened layer depth after high and
medium induction hardening.
2 Normative references
The following standards contain the provisions which, through reference in this
Standard, constitute the provisions of this Standard. For dated references,
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard. However, the parties who enter into agreement based on this
Standard are encouraged to investigate whether the latest versions of these
documents are applicable. For undated reference documents, the latest
versions apply to this Standard.
GB/T 5617, Determination of effective depth of hardening after induction or
flame hardening of steel (GB/T 5617-2005, ISO 3754.1976, NEQ)
3 Technical requirements
3.1 The surface hardness of the part and the effective hardened layer depth
shall comply with the provisions of the product drawings.
3.2 After the parts are quenched, there shall be no defects such as cracks or
burns on the surface.
3.3 After quenching and low temperature tempering (≤200°C), the
metallographic structure is evaluated according to Figures 1a) ~ j). See Table 1
for rating description.
4 Sample preparation
4.1 Sampling site. intercept in the middle of the induction hardening zone of
the part or intercept according to the technical conditions of the part. There shall
be no tempering when sampling.
5 Inspection methods
5.1 Effective hardened layer depth measurement method. after quenching
and low temperature tempering, the parts are measured on a Vickers hardness
tester with a test force of 9.8N on a specified portion of the cross section
perpendicular to the surface of the part.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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